Walking cane



FIG. 1 is a left side elevation view of a walking cane;

FIG. 2 is a right side elevation view thereof;

FIG. 3 is a front side elevation view thereof;

FIG. 4 is a rear side elevation view thereof;

FIG. 5 is a top side elevation view thereof; and,

FIG. 6 is a bottom side elevation view thereof.

The broken lines depict portions of the article that form no part of the claimed design. 

CLAIM The ornamental design for a walking cane, as shown and described. 